Sleep as Android - Common alarm clocks ignore your sleep cycles, they wake you on schedule no matter your are currently in your deep sleep. Waking up from deep sleep is unpleasant, it makes you tired and it may negatively affect your productivity during the whole day.

Shhh Noise - A free sound generator designed to increase focus and relaxation.

Sleepedy - Personal sleep coaching & therapy

Sleepy Baby - Help your baby sleep with the Sleepy Baby soundboard.

Pzizz - Sleep at the push of a button! Now with "Focus"

WiredVibe - WiredVibe - Music designed for the brain to improve focus, relaxation, and sleep within 15 minutes of use.